$OpenBSD: patch-libs_util_posix_execute_system_cpp,v 1.1 2017/05/22 20:30:52 espie Exp $

Index: libs/util/posix/execute_system.cpp
--- libs/util/posix/execute_system.cpp.orig
+++ libs/util/posix/execute_system.cpp
@@ -33,6 +33,7 @@
 #include <signal.h>
 #include <sys/wait.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include <aqsis/util/logging.h>
 #include <aqsis/util/exception.h>
